Germany consists of 16 different states with a state capital each. Some are city states, but most are not. They vary in population size and have an own armorial each. These city states are shown on the map here with their corresponding armorial and a link to their Wikipedia entry. The population size is given as number and used as parameter for a circle around the city (10 times the square root; maybe only seen when zoomed in).
Mainz and Wiesbaden are pretty close to each other so you maybe have to zoom in to count all 16 states.
